Heel ulcers are among the most challenging pressure injuries to treat, yet they are largely preventable. This evidence-based guide covers causes, staging, medical and surgical treatments, warning signs, and the specific footwear features that protect the heel during healing and beyond.
- Why Heel Ulcers Deserve Special Attention
- Root Causes & Risk Factors
- Staging Heel Ulcers: From Stage 1 to Deep Tissue Injury
- Medical & Surgical Treatment Options
- Prevention Strategies That Work
- The Right Footwear & Offloading Devices for Heel Protection
- Warning Signs: When to Seek Urgent Care
- Frequently Asked Questions About Heel Ulcers
Why Heel Ulcers Deserve Special Attention
Heel ulcers are a subtype of pressure injury that occurs on the posterior or plantar surface of the calcaneus. Unlike ulcers on other parts of the foot, the heel carries the full weight of the body during standing and walking, has a thin subcutaneous fat pad, and is vulnerable to shear forces from bed linens and ill-fitting shoes. These factors make heel ulcers particularly slow to heal and prone to infection.
In people with diabetes, peripheral artery disease, or impaired mobility, a small heel blister can escalate to a bone infection within weeks. That is why early recognition and proper offloading—especially through footwear—are non‑negotiable. This guide synthesizes the latest 2026 guidelines from the National Pressure Injury Advisory Panel (NPIAP) and the American College of Foot and Ankle Surgeons.
Root Causes & Risk Factors
Understanding why heel ulcers form is the first step to prevention. The primary drivers are persistent pressure, shear, and moisture—often in combination. Below are the most common scenarios.
Staging Heel Ulcers: From Stage 1 to Deep Tissue Injury
Accurate staging determines treatment intensity and prognosis. The NPIAP 2019 update replaced the term “Stage 4” with a category for unstageable and deep tissue injury. Here is the classification used in 2026.
Non‑blanchable erythema – Intact skin with a reddened area that does not turn white when pressed. The skin may feel warmer or firmer.
Intervention: Immediate offloading, repositioning, and padding. No debridement needed.
Partial‑thickness loss – Shallow open ulcer with a pink wound bed, without slough or bruising. May present as a blister.
Intervention: Cleanse with saline, apply a hydrocolloid or foam dressing, and offload completely.
Full‑thickness loss – Subcutaneous fat may be visible, but bone, tendon, or muscle is not exposed. Undermining or tunneling may be present.
Intervention: Sharp or enzymatic debridement, infection control, negative pressure wound therapy often considered.
Exposed bone, tendon, or muscle – High risk of osteomyelitis. Deep tissue injury presents as a maroon or purple area under intact skin that rapidly deteriorates.
Intervention: Surgical debridement, bone biopsy, culture‑guided antibiotics, and often flap reconstruction.
Staging is only possible after the wound is fully cleaned and all necrotic tissue is removed. Unstageable ulcers (covered in slough or eschar) must be debrided before staging can be assigned.
Medical & Surgical Treatment Options
Treatment for heel ulcers involves a multi‑disciplinary approach. The four pillars are: offload, debride, manage infection, and optimize healing environment. Below is a typical step‑by‑step protocol.
Do not apply heat (heating pads, hot water bottles) to a heel ulcer or to numb feet. Heat can cause severe burns that are unnoticed due to neuropathy, worsening the wound.
Prevention Strategies That Work
Preventing a heel ulcer is far more effective than treating one. These evidence‑based measures are endorsed by the 2026 NPIAP guidelines.
- Daily foot inspection – Use a mirror to see the back of the heel. Look for redness, blisters, cracks, or warmth.
- Skin care – Apply a urea‑based moisturizer daily, but avoid between toes. Keep feet dry, especially around the heel.
- Offloading in bed – Place a pillow or foam pad under the calves to elevate the heels off the mattress. Never use donut‑shaped cushions.
- Appropriate footwear – Always wear well‑fitted, padded shoes with a low heel counter. Avoid slip‑ons that rub the back of the heel.
- Glycemic control – Keep HbA1c below 7.5% to preserve skin integrity and immune function.
- Smoking cessation – Nicotine reduces microcirculation to the skin. Smoking is one of the strongest risk factors for non‑healing ulcers.
The Right Footwear & Offloading Devices for Heel Protection
Proper footwear is a cornerstone of both prevention and healing. The heel is vulnerable because standard shoes often have a rigid counter that presses into the Achilles insertion or the heel pad. Here are the specific features to look for—whether you are shopping for an at‑risk patient or someone already in recovery.
Warning Signs: When to Seek Urgent Care
A heel ulcer can deteriorate rapidly. Recognize these red flags that require prompt medical evaluation (within 24 hours or sooner).
If you or a loved one has diabetes and a sore on the heel that does not start to improve within 48 hours of offloading, contact your podiatrist or wound care center immediately. Many clinics now offer tele‑health wound assessments that can be done from home.
Frequently Asked Questions About Heel Ulcers
Can a heel ulcer heal without surgery?
Yes, many Stage 1 and Stage 2 heel ulcers heal with conservative care: aggressive offloading, moist wound dressings, and infection control. However, deeper ulcers (Stage 3 and 4) often require surgical debridement or flap closure. The key is early intervention—small ulcers that are caught early can resolve in 4–8 weeks with proper offloading.
What is the best dressing for a heel ulcer?
The ideal dressing depends on the stage. For dry, shallow ulcers, a hydrocolloid or thin foam dressing works well. For exudating wounds, an alginate or hydrofiber dressing with a foam secondary cover is preferred. For deep wounds with tunneling, a cavity‑filling dressing such as a calcium alginate rope or a gelling fiber is used. Always consult a wound care nurse for a specific product recommendation.
How long does it take for a heel ulcer to heal?
Healing time varies widely. A Stage 1 or 2 ulcer may heal in 2–6 weeks if pressure is completely removed. Stage 3 ulcers typically take 4–12 weeks, and Stage 4 ulcers can take several months to a year. Factors like diabetes, smoking, and poor nutrition significantly slow healing. On average, only about 50% of diabetic heel ulcers heal within 20 weeks of standard care.
Can I walk with a heel ulcer?
Walking should be minimized or avoided depending on the stage. For a Stage 1 or 2 ulcer, you may walk only with a special offloading boot that completely protects the heel. For deeper ulcers, non‑weight‑bearing is often required. Using crutches, a walker, or a knee‑scooter can help. Never walk barefoot—even indoors—because of the risk of pressure and contamination.
Are heel ulcers always caused by diabetes?
No. While diabetes is the most common underlying condition, heel ulcers also occur in people with peripheral artery disease, spinal cord injury, multiple sclerosis, or any condition that leads to immobility. Elderly patients with fragile skin and limited mobility are also at high risk. In fact, 10–15% of hospital‑acquired pressure injuries occur on the heel in non‑diabetic patients.
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